Head-motion for looms.



H. F. LIVERMORE.

HEAD MOTION FOR LOOMS.

APPLICATION FILED 11111122. 1912.

v -Patented Feb. 18, 1913.

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(OLUMBIA FLANoaRAPH Co..w^sMlNuToN. D. c.

H. F. LIVERMORE.

HEAD MOTION FOR LOOMS.

APPLICATION FILED 1111.22. 1912.

1,053,307. Patented Feb. 18, 1913.

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cOLUMBlA PLANQRAPH C41. WASHINUTDN. D. c.

HOMER F. LIVERMORE, OF BROOKLINE, MASSACHUSETTS.

HEAD-MOTION FOR LOOMS.

Specification of Letters Patent.

Patented Feb. 18, 1913.

Application led January 22, 1912. Serial No. 672,576.

To all whom t may concern: y

Be it known that I, I-IoMEn F. LIVER- MoRE, a citizen of the UnitedStates, residing at Brookline, in the county of Norfolk and State ofMassachusetts, have invented new and useful Improvements in Head-Motionsfor Looms, of which the following is a specification.

This invention relates to improvements in head motions for looms and isdesigned to overcome the troubles usually associated with devices ofthis character now in general use. The vibrator lever together with theconnector is usually constructed of castiron and owing to the eXtremethinness of the metal used which is necessitated by the limited amountof space into which a large number of the devices have to be placed, thelife of said parts is very short, breakage occurring often and therebyrendering the device expensive and causing a great deal of annoyance.

The object of the invention is to provide a mechanism which may beconstructed of suitable sheet material and which will be adapted towithstand stresses and strains naturally imposed upon devices of likecharacter in a manner far superior to that of the devices now in generaluse..

The object is further to provide a mechanism having connections andpivots which are adapted to occupy a minimum amount of space and whichwill not work Vloose or break under the ordinary amount of work appliedthereto.

The invention consists in the combination and arrangement of parts setforth in the following specification and particularly pointed out in theclaims thereof.

Referring to the drawings: Figure 1 is a detail sectional view showingthe essential working parts of a well-known type of head motion forlooms embodying my invention and showing its connection with a loomharness in dotted lines and very much reduced in size. Fig. 2 is adetail plan section taken on line2-2of Fig. 1 showing a plurality ofvibrators in their relative positions. Fig. Sis an enlarged detailsection taken on line 3 3 of Fig. 1. Fig. 4 is a section part elevationtaken on line 4 4 of Fig. 1. Figs. 5 to 8 inclusive are detail views ofthe parts shown in the section at the right of Fig. 4 with said parts asthey would appear before assembling. Fig. 9 is a detail section of thestud embodied in the section at the left of Fig. 4. Fig. l0 is a detailelevation of of the arrow B with the connector broken` away to savespace. Fig. 12 is a detail side view of the stops formed on the vibratorlever and adapted to engage the semicircular slot in the vibrator gear,said lever being shown broken away. Fig. 18 is a section taken on line13-13 of Fig. 172. Fig. 14 is a detail sectiontaken on` line 14, 14 ofFig. 4 which illustrates a modified form of Y the pivot shown in Fig. 4.

Like numerals refer to like parts throughout the several views of thedrawings.

In the drawings 10 and 11 represent a pair of cylinder gears of a wellknown type of head motion and which are adapted to be rotated in thedirection ofthe arrows shown in connection therewith by means not shownin the drawing, but well known to those skilled in the art. tion of theclass illustrated in said drawings is adapted to be used in connectionwith looms `having a large number of harnesses, as for instance, whenweaving wo-olen or worsted fabrics some looms employ as manyas 36harnesses, each of said harnesses requiringv a different operatingmechanism. It will therefore be evident in view of this fact that itwill be necessary to have a device which occupies a very small amount ofspace as otherwise a loom having such a large number of harnesses wouldrequire too much room. To this end I have employed a mechanism having avibrator gear 12 formed of sheet material which is rotatably mountedupon a vibrator lever 13 also formed of sheet material and fulcrumed ona rod 14.

A vibrator gear 12 is located intermediate the cylinder gears 10 and 11and is adapted to be moved alternately into and out of engagement withsaid cylinder gears by apattern chain 15 which is supported by a chaincylinder 16. The chain cylinder 16 is rotated by suitable mechanism notshown in the drawing whereby the risers 17 which are carried by saidchain are brought into contact with the run 18.

It will be obvious that with a chain of the character shown in saiddrawings, the

rlhe head moportion of the lever 13 against which the risers 17 contactWill be subjected to a great deal of Wear. It has therefore been foundnecessary to provide a device commonly called a run or ,a chill, whichis formed of hardened material and has a face thereon Wider than is theedge of the lever 13 and vusually riveted to said lever. This device isusually placed upon thesame side of the lever 13 as that upon Which thegear 12 is located. j Y.

Referring to Figs. 2, 4, 9 and 10, the vibra- '.tor gear 12 is pivotallymounted upon a tubular stud 19 having a body portion 20 Y and a smallerportion 21, said stud also hav- Vin g a flange-22 located upon t-he bodyporlticn'of said stud adjacent to the smaller portion 21.V rl`he smallerportion 21 and the flangeV 22' are adapted to project into correksponding holes formed in the lever 13 and a plate 23 preferablyidentical in contour Wit-h ,the end of the lever 13 adjacent to said vi-Y brator gear is preferably permanently secured to said lever by anelectric Welding 25 process, the inner facevof said plate engaging theouter cheek 24 ofthe flange 22, therebypreventing said stud from beingremoved from .the lever 13. To doubly secure said i stud and preventrotation thereof the smaller portion 21 of the stud 19 is iattened at 25and the hole into Which it projects correspondingly formed. The vibratorgear 12 Whichis mounted on said stud 19 is retained in its rotatableengagement therewith by a i tubular rivet 26 provided with an enlargeddisk shaped head 27 which engages said gear Within a counterbore 28Which is substan- Y tially equal indepth to the thickness of said diskshaped head, thus bringing the outer face of said head in alinement Withthe outer Isurface of said gear, and a rivet 29 having a flat head 30Which preferably engages the countersunk end 31 of thestud 19 issecurely riveted at its opposite end against the head of the tubularrivet 26. 1

Y The countersunk end 31 of the stud 19 is lpreferably scored as at 32and upon the riveting of the rivet 29, the head 30 is forced against andint-o said scoring thereby preventing said rivet from rot-ating Withinthe stud 19 in case it should become slightly loosened by the constantWear and vibration of the moving parts. Y

The gear 12 is provided with a semicircular slot 33 into which theprojections 34 and 35 extend. These projections are pref- Y erablyformed integral With the vibrator le- Y ver 13 or with the plate 23Which is secured thereto and form as it were a cylindrical stud. Theprojection 34 engaging one end of said slot 33 and the projection 35engaging the opposite end of said slot and thereby f limiting therocking movement of said gear upon said lever 13 and causing it to stopat the desired point in order to insure the teeth on said gear properlymeshing With the teeth on the cylindrical gears 10 and 11.

The vibrator gear 12 is in turn connected through a connector 36 to aharness jack 37 which is pivoted at 38 and is formed in the 70 shape ofa bell crank lever having arms 39 and 40. These arms being connected, ina manner Well known tothose skilled in the art, to their respectiveharnesses.

The connector 36 is formed of malleable 75 material such as cold rolledsteel and is pivotally connected at 41 to the gear 12 and at 42separably and pivotally to the harness jack 37. The end 42 of saidconnector is preferably7 forked, one of the legs thereof 80 being formedintegral with the body of said' connector and oifset at 43 While theother leg thereof is formed of the same material and is secured to thebody of said connector preferably by an electric Welding process,whereupon a permanent connection is formed between said legs, this legis also offset at 44 thereby bringing the center of the space betweensaid legs in alinement With the face of the connector engaging the gear12 or in other Words in alinement With the inner face of saidigear.

The opposite end 41 of the connector 36, when said connector is formedof cast-iron has usually. cast thereon a projection which forms thepivotal connection between said connection and said gear. A great dealof trouble is often caused by this connection breaking oit next to theconnector, but with a steel connector of applicants type a stud ofstronger and harder material may be employed. The stud 45 is shoulderedand has a body ortion 46 pivotally engaging the gear 12 `see Figs. 1, 4,5, 6, 7, 8 and 15) said stud also has a smaller portion 47 adapted toengage said connector and is provided with an annular recess 48 which ispreferably disposed at a point adjacent to the juncture of said body andsmaller portions and oblique to the medial axial line of said stud, andby reason of the oblique disposition of said recess it is possible tocut said recess much deeper than would be possible in case the same Wereformed Within the smaller portion of said stud atright angles to saidmedian axial line, as in this case the end of said smaller portion wouldbe almost entirely cut'through. The connector 36 has formed thereon,after the smaller portion of said stud has been inserted Within the holein said connector, a Bange 49, by swaging the material adjacent to saidhole into the annular recess 48 formed in said stud and forms a secondannular recess 50 in the outer face of the connector 36. By the peculiarangle of the flange 49 the metal of the connector 36, Which surroundsthe smaller portion of the stud 45, is prevented from expanding or beingforced apart by the strain upon said stud as Well as being preventedfrom moving longitudinally of said stud. With this combination it willbe possible to employ a hardened stud and thus prolong the life of theconnector.

A relative rotation between the lstud 45 and the connector 36 isprevented by the flattened face 51 on said stud, as the metal aroundsaid stud is formed to correspond with said flattened face by theswaging operation hereinbefore referred to. A rotatable engagementbetween said stud and the gear 12 is maintained by the tubular rivetJ 52and rivet 53 which are preferably connected in the same manner as arethe rivets 26 and 29 in the stud 19.

Referring to Figs. 1 and 2 it will be noted that the distance betweenthe outer faces of the legs of the forked end 36 is equal to thedistance between the outer face of the vibrator lever 13 and the oposite face of the vibrator gear 12 and furt ermore said distance isequal to the thickness of the lever 13 and boss 54, said boss beingformed by electrically welding the hub 54 to the face of said lever uponwhich the plate 23 is welded.

It is essential that the center line of the harness jack and of therisers 17 should both be in alinement with a plane passing through thecenter of the hub 54, containing the face to which the run 18 is securedand also containing the inner face of the gear 12 which contacts withthe face of the lever 13. A plane containing the face of the run 18which engages the lever 13 substantially bisects the face of said runagainst which the risers 17 contact, therefore in order that the face onthe lever 13 which engages said run shall be in alinement with the innerface of the gear 12, it will be necessary to offset the lever 13 as at55 (see Fig. 3) this offset forming a recess 56 which contains the headsof the rivets 57. The pivotal connection hereinbefore described, as forinstance, the stud 19 between said vibrator gear 12 and the vibratorlever 13 is a substantially permanent connection and is designed to wearas long, and possibly longer, than the other parts of the device. One`feature which is particularly necessary to the solidity and durabilityof said pivots is that the means for retaining said members in rotatableengagement, one with the other, are so constructed and so firmly rivetedtogether that a relative movement therebetween will be impossible. Ashereinbefore describedv this is prevented by forcing the head of therivet 30 into the scorings 31 formed in the stud 19 by the upsetting ofthe opposite ends of the rivet 29 against the head of the rivet 26,provided said rivet 29 does not become loosened by the excessive strainof the moving parts and permit the head 30 from becoming disengaged fromthe scorings 31. To doubly insure the prevention of a relative movementbetween said members, I have shown in Fig. 14 as a modified form, arivet 29 provided with corrugations 58, 58 which engage correspondingrecesses in the interior of the tubular rivet 26 coperating with thecorrugations or scorings 31, and preventing rotation between said rivet29 and tubular rivet 26 and also between said rivets and the stud 19. Inaddition to Vthis the tubular rivet 26 may also be provided withprojections 59 which will engage correspondin depressions formed withinthe stud 19. The same construction as just described isalso applicableto the lstud 45, tubular rivet 52 and rivet 53. If for any reason it isfound necessary to disconnect said members, which would be the case ifany of said members became injured, the same may be accomplished bydrilling into the ends of the rivets 29 and 53 at the upset ends thereofand forcing the same from their positions within the tubular rivets26and 52. In removing a vibrator mechanism from said head motion thevibrator lever 13 is removed from the rod 14 and the connector 36separated from the arm 40 of the harness jack 37 whereupon the wholemechanism may be withdrawn.

Although I have shown and described my invention as being particularlyadaptedto head motions for looms, it must be seen that it need not andshould not be restricted eX- clusively to machines of this class.

Having thus described my invention what I claim and desire by LettersPatent to secure is:

1. A head motion for looms embodying, in its construction, a vibratorgear, a connector, a shouldered stud having a body portion adapted torotatably engage one of the aforesaid members, said stud also having asmaller portion adapted to engage the other of said members and providedwith an annular recess oblique to the median axial line of said stud,and disposed therein at a point adjacent to the junction of said bodyand smaller portions, a corresponding flange on said connectorprojecting into said re cess, and means adapted to retain said bodyportion and the member rotatably mounted thereon in rotatable engagementone with the other.

2. A head motion for looms embodying, in its construction, a vibratorgear, a connector formed of malleable material, a tubular stud'having abody portion adapted to rotatably engage one of the aforesaid members,said stud also having a smaller portion adapted to engage the other ofsaid members and provided with an annular recess, oblique to t-he medianaxial line of said stud, and disposed therein at a point adjacent to thejunction of said body and smaller portions, corresponding fiange formedon said second member projecting into said recess, a tubular rivetadapted to engage `the interior of said `tubular stud, andA a secondrivet adaptedto secure saidtubular rivet within saidtubular studwherebyy said body portion and said first member are r.retained inrotatable engagement one with the other.

3. A, head motion for looms embodying,

in its-construction, a vibrator gear, aconnector yformed of malleablematerial, a tubulari stud having a body portion adaptedto rotatablyengage one of the aforesaid mem- ,to'engage the interior of said stud, asecond ast-ud having a body portion adapted to rosof stud alsohaving asmaller portionofl irreg-v bers, said stud also having a smaller portionadapted to engage the other of said members and secured thereto, atubular rivet adapted rivet adapted to fasten said stud and said tubularrivet together, and means on said second rivet adapted to engagerecesses in said tubular stud, whereby a relative rotary movementbetween said tubular stud and said second rivet is prevented.`

4. A: head motion for looms having, in combination,4 a vibrator gear, avibrator lever adapted to rotatably support said gear,

tatably engage one of the aforesaid members, said stud also having asmaller portion projecting into a corresponding hole inthe other of saidmembers, a flange on ysaid body portion adjacent to said smaller portionadapted ato engage a recess in said other member, ar plate adapted to bepermanently secured tosaid other member adjacenttof said stud, to engagesaid flange,

whereby said stud is locked Within said ver` adapted ato` rotatably.support said gear,-

astud having. a `body portion rotatably engagingbne of Ithefaltoresaidmembers, said ular vshape projecting int-o :aA correspond- 4inglyAshaped hole in the other of said menibers, aflange on said body portionadjacent to said smaller portion also engaging a hole in said othermember, and a plate permanently-secured to said other member adjacent tosaid stud, and engaging said iange, whereby said stud. is looked withinsaid hole.

6. A head motion for looms having, in combination, a vibrator gear, avibrator leverk adapted to rotatably support lsaid gear, a tubular studhaving a body portion rotatably engaging said gear, said stud alsohaving a smaller portion projecting. into a corresponding hole in saidlever, a flange on said body portion adjacent to said smaller portionprojecting into a corresponding recess in said lever, a plate adapted tobe permanently secured to said lever adjacent to said stud, and engageonev cheek of -said flange, whereby said stud is locked within said holeand a rivet adapted to be riveted inV said .tubular stud to retain saidgear in rotatable engagement therewith.

7. A head motion for looms having, in

i'combination, a vibrator lever, a `iianged tubular stud, one end ofsaid`stud and said flange projecting. into a correspondingly shaped hole andrecess respectively in said lever, a plate adapted to be secured to saidlever, and engage the outer cheek of said flange, a vibrator gearrotatably mounted on the outer end of said stud, a tubular rivet adaptedto engage the interior of said tubular stud, a rivet adapted to securesaid tu-A bular rivet within said tubular stud and means adapted to locksaid rivet and stud together, whereby a relative rotationv therebetweenis prevented.

In testimony whereof I have hereunto set my hand in presence of twosubscribing witnesses. HOMER F. LIVERMORE.

Vitnesses:

FRANKLIN E. Low, SYDNEY E. TAFT.

Copies of this. patent may be obtained for five .cents each, byaddressing the Commissioner of Patents.

pwashington, I). C."

